cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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termios.h (2877B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef _ASM_GENERIC_TERMIOS_H
      3#define _ASM_GENERIC_TERMIOS_H
      4
      5
      6#include <linux/uaccess.h>
      7#include <uapi/asm-generic/termios.h>
      8
      9/*	intr=^C		quit=^\		erase=del	kill=^U
     10	eof=^D		vtime=\0	vmin=\1		sxtc=\0
     11	start=^Q	stop=^S		susp=^Z		eol=\0
     12	reprint=^R	discard=^U	werase=^W	lnext=^V
     13	eol2=\0
     14*/
     15#define INIT_C_CC "\003\034\177\025\004\0\1\0\021\023\032\0\022\017\027\026\0"
     16
     17/*
     18 * Translate a "termio" structure into a "termios". Ugh.
     19 */
     20static inline int user_termio_to_kernel_termios(struct ktermios *termios,
     21						const struct termio __user *termio)
     22{
     23	unsigned short tmp;
     24
     25	if (get_user(tmp, &termio->c_iflag) < 0)
     26		goto fault;
     27	termios->c_iflag = (0xffff0000 & termios->c_iflag) | tmp;
     28
     29	if (get_user(tmp, &termio->c_oflag) < 0)
     30		goto fault;
     31	termios->c_oflag = (0xffff0000 & termios->c_oflag) | tmp;
     32
     33	if (get_user(tmp, &termio->c_cflag) < 0)
     34		goto fault;
     35	termios->c_cflag = (0xffff0000 & termios->c_cflag) | tmp;
     36
     37	if (get_user(tmp, &termio->c_lflag) < 0)
     38		goto fault;
     39	termios->c_lflag = (0xffff0000 & termios->c_lflag) | tmp;
     40
     41	if (get_user(termios->c_line, &termio->c_line) < 0)
     42		goto fault;
     43
     44	if (copy_from_user(termios->c_cc, termio->c_cc, NCC) != 0)
     45		goto fault;
     46
     47	return 0;
     48
     49 fault:
     50	return -EFAULT;
     51}
     52
     53/*
     54 * Translate a "termios" structure into a "termio". Ugh.
     55 */
     56static inline int kernel_termios_to_user_termio(struct termio __user *termio,
     57						struct ktermios *termios)
     58{
     59	if (put_user(termios->c_iflag, &termio->c_iflag) < 0 ||
     60	    put_user(termios->c_oflag, &termio->c_oflag) < 0 ||
     61	    put_user(termios->c_cflag, &termio->c_cflag) < 0 ||
     62	    put_user(termios->c_lflag, &termio->c_lflag) < 0 ||
     63	    put_user(termios->c_line,  &termio->c_line) < 0 ||
     64	    copy_to_user(termio->c_cc, termios->c_cc, NCC) != 0)
     65		return -EFAULT;
     66
     67	return 0;
     68}
     69
     70#ifdef TCGETS2
     71static inline int user_termios_to_kernel_termios(struct ktermios *k,
     72						 struct termios2 __user *u)
     73{
     74	return copy_from_user(k, u, sizeof(struct termios2));
     75}
     76
     77static inline int kernel_termios_to_user_termios(struct termios2 __user *u,
     78						 struct ktermios *k)
     79{
     80	return copy_to_user(u, k, sizeof(struct termios2));
     81}
     82
     83static inline int user_termios_to_kernel_termios_1(struct ktermios *k,
     84						   struct termios __user *u)
     85{
     86	return copy_from_user(k, u, sizeof(struct termios));
     87}
     88
     89static inline int kernel_termios_to_user_termios_1(struct termios __user *u,
     90						   struct ktermios *k)
     91{
     92	return copy_to_user(u, k, sizeof(struct termios));
     93}
     94#else /* TCGETS2 */
     95static inline int user_termios_to_kernel_termios(struct ktermios *k,
     96						 struct termios __user *u)
     97{
     98	return copy_from_user(k, u, sizeof(struct termios));
     99}
    100
    101static inline int kernel_termios_to_user_termios(struct termios __user *u,
    102						 struct ktermios *k)
    103{
    104	return copy_to_user(u, k, sizeof(struct termios));
    105}
    106#endif /* TCGETS2 */
    107
    108#endif /* _ASM_GENERIC_TERMIOS_H */